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- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Hugh Smith at The University of Guelph.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)replace.c 5.8 (Berkeley) 3/15/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <dirent.h>
- #include <errno.h>
- #include <unistd.h>
- #include <ar.h>
- #include <stdio.h>
- #include <string.h>
- #include "archive.h"
- #include "extern.h"
-
- extern CHDR chdr; /* converted header */
- extern char *archive; /* archive name */
- extern char *tname; /* temporary file "name" */
-
- /*
- * replace --
- * Replace or add named members to archive. Entries already in the
- * archive are swapped in place. Others are added before or after
- * the key entry, based on the a, b and i options. If the u option
- * is specified, modification dates select for replacement.
- */
- replace(argv)
- char **argv;
- {
- extern char *posarg, *posname; /* positioning file name */
- register char *file;
- register int afd, curfd, mods, sfd;
- struct stat sb;
- CF cf;
- off_t size, tsize;
- int err, exists, tfd1, tfd2;
- char *rname();
-
- err = 0;
- /*
- * If doesn't exist, simply append to the archive. There's
- * a race here, but it's pretty short, and not worth fixing.
- */
- exists = !stat(archive, &sb);
- afd = open_archive(O_CREAT|O_RDWR);
-
- if (!exists) {
- tfd1 = -1;
- tfd2 = tmp();
- goto append;
- }
-
- tfd1 = tmp(); /* Files before key file. */
- tfd2 = tmp(); /* Files after key file. */
-
- /*
- * Break archive into two parts -- entries before and after the key
- * entry. If positioning before the key, place the key at the
- * beginning of the after key entries and if positioning after the
- * key, place the key at the end of the before key entries. Put it
- * all back together at the end.
- */
- mods = (options & (AR_A|AR_B));
- for (curfd = tfd1; get_arobj(afd);) {
- if (*argv && (file = files(argv))) {
- if ((sfd = open(file, O_RDONLY)) < 0) {
- err = 1;
- (void)fprintf(stderr, "ar: %s: %s.\n",
- file, strerror(errno));
- goto useold;
- }
- (void)fstat(sfd, &sb);
- if (options & AR_U && sb.st_mtime <= chdr.date)
- goto useold;
-
- if (options & AR_V)
- (void)printf("r - %s\n", file);
-
- /* Read from disk, write to an archive; pad on write */
- SETCF(sfd, file, curfd, tname, WPAD);
- put_arobj(&cf, &sb);
- (void)close(sfd);
- skip_arobj(afd);
- continue;
- }
-
- if (mods && compare(posname)) {
- mods = 0;
- if (options & AR_B)
- curfd = tfd2;
- /* Read and write to an archive; pad on both. */
- SETCF(afd, archive, curfd, tname, RPAD|WPAD);
- put_arobj(&cf, (struct stat *)NULL);
- if (options & AR_A)
- curfd = tfd2;
- } else {
- /* Read and write to an archive; pad on both. */
- useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
- put_arobj(&cf, (struct stat *)NULL);
- }
- }
-
- if (mods) {
- (void)fprintf(stderr, "ar: %s: archive member not found.\n",
- posarg);
- close_archive(afd);
- return(1);
- }
-
- /* Append any left-over arguments to the end of the after file. */
- append: while (file = *argv++) {
- if (options & AR_V)
- (void)printf("a - %s\n", file);
- if ((sfd = open(file, O_RDONLY)) < 0) {
- err = 1;
- (void)fprintf(stderr, "ar: %s: %s.\n",
- file, strerror(errno));
- continue;
- }
- (void)fstat(sfd, &sb);
- /* Read from disk, write to an archive; pad on write. */
- SETCF(sfd, file,
- options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD);
- put_arobj(&cf, &sb);
- (void)close(sfd);
- }
-
- (void)lseek(afd, (off_t)SARMAG, SEEK_SET);
-
- SETCF(tfd1, tname, afd, archive, NOPAD);
- if (tfd1 != -1) {
- tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR);
- (void)lseek(tfd1, (off_t)0, SEEK_SET);
- copy_ar(&cf, size);
- } else
- tsize = 0;
-
- tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR);
- (void)lseek(tfd2, (off_t)0, SEEK_SET);
- cf.rfd = tfd2;
- copy_ar(&cf, size);
-
- (void)ftruncate(afd, tsize + SARMAG);
- close_archive(afd);
- return(err);
- }
-